main-truck

Noun.  (nautical) On a wooden mast, a circular disc (or sometimes a rectangle) of wood near or at the top of the mast, usually with holes or sheaves to reeve signal halyards; also a temporary or emergency place for a lookout. "Main" refers to the mainmast, whereas a ''truck'' on another mast may be called (on the mizzenmast, for example) "mizzen-truck".

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This entry was last updated on RefTopia from its source on 3/20/2012.